Concrete form



. HARRIS.

CONCRETE FORM.

APPLICATION FILED MAY]? Patented Oct. 17, 1922.

2 sHEETs-sHEU 1.

gwuenko'a J. W. HARRIS.

CONCRETE FORM. I

APPLICATION FILED MAY 17, I921.

LASQQQGO 4 Patented 00w 1?, 1922,

2 SHEET$-SHEET 2.

Patented @et. 1?, i922.

and L- J'OEN W. HARRIS, 0F PEAR-SALL, TEXAS.

CONCRETE FORM.

Application filed May 1?,

To all 10 [tom it may concern:

Be'it'known that 1, JOHN W. Harms, a citizen of the United States,residing at Pearsall, in the'county of Frio and State ofTeXas, haveinvented a new and useful Concrete-Form, of 'whiehthe following is aspecification.

Thisiinvention relatesto concrete moulds or forms, and-more particularlyto moulds ofthe 'separable type.

The primary object ofthe invention is toprovide a mould including aplurality of separable sections, the sections being of constructions topermit the same to be nested onewithin the other to facilitate thetransportation and storage thereof.

A furtherbut important object of the invention is to provide means foradj ustably connecting the adjacent ends of the bracing rings ofthemould.

A still further object of the invention is to provide means for lockingthe ends of the circular members forming the body portion of the mould,the locking means being such as to permit the ready and easy application thereof.

WVith the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, may be made within thescope of what is claimed, without departing from the spirit of theinvention.

Referring to the drawings Figure 1 is aplan view of a mould in itsassembled form.

Figure 2 is a transverse sectional view through the mould.

Figure 3 is a sectional detail disclosing the supporting blocks.

Figure 4 is a fragmental sectional view through adjacent ends of one ofthe bracing rings.

Figure 5 is a sectional detail view disclosing the adjustable connectionbetween predetermined sections of the ring.

Figure 6 is a fragmental detail view of adjacent ends of one of themembers formin the body portion of the mould.

igure 7 is a detail view of one ofthe 1921. Serial No. 470,317.

locking members of the body portion of the mould.

Figure 8 is a plan view of the same.

Figure 9 is a perspective view of. one of the locking members.

Referring to the drawings in detail, the mould includes a body portionformed of the outer and inner split bands 5 and 6, the bands beingformed of suitable sheet metal and arranged in circular formation, it being understood that the particular mould is employed. for constructingconcrete watertroughs or the like.

The outer band of the body portion indicated at 5 is of a diametergreater than the diameter of the inner band 6, so that when the band 6is positioned within the con fines of the outer band 5, a suitable spacewill be provided therebetween to accommodate the cement or material usedin connection with the mould for forming the finished tank or trough. Asshown, each of the members 5 and 6 is provided with elongated openings 7formed in the overlapping ends thereof, which openings are designed toaccommodate the keys or locking members 8. Each of these keys includes abody portion and lug 9 having an offset portionlO, the offset portion 10being for the purpose of closely engaging one of the faces of the bandassociated therewith to secure the adjacent ends of the band together,the lugs 9 being of diameters to permit the ready insertion thereofwithin the elongated openings 7, whereupon movement of the band causesthe walls of the elongated openings to grip the key positioned therein.

Supporting blocks 11 are employed in connection with the mould and eachof these blocks is provided with a groove formed in the upper surfacethereof, the groove being curved to accommodate the inner band 6, whilethe outer extremity of the blocks contact with the inner surface of theouter band 5 to support the same in proper spaced relation with theinner band 6.

It might be further stated that these supporting blocks 11 support theinner band 6 in spaced relation with the surface on which the mould ispositioned, and as shown, the inner band 6 is of a width less than thewidth of the outer band 5 to provide a space between the lower edge ofthe band and the surface on which the mould is positioned to permit aportion of the cement or concrete poured between the bands to pass intothe central portion of the mould, to form the bottom of the finishedtrough.

Bracing rings are provided within the inner band member, each bracingring being formed of a plurality of sections 12, and as shown, eachbracing ring is provided with an extension 13 to be positioned withinone end of the adjacent section to unite the sections and preventmovement of one section with respect to the other.

As clearly shown by Figure 5 of the drawings, a spacing bolt 14; isprovided, which bolt is threaded to accommodate the spacing nuts 15, theends of the bolt 14: being positioned in adjacent ends of two of thesections, the nuts 15 being operated to expand, or move the sections ofthe supporting ring away from each other, causing the ring to closelyengage the inner surface of the inner band 6.

It is to be understood that two of these bracing rings are employed, onebeing positioned adjacent to the upper edge of the inner band, while theother is positioned adj acent to the lower edge thereof. In order thatthe bands 5 and 6 may be held in spaced relation at points between thesupporting blocks 11, bars 16 are provided, the bars being positioned sothat the ends thereof contact with the bands 5 and 6.

In the use of the device when the bands are positioned as shown byFigure 1 of the drawings, concrete or cement material is poured betweenthe bands 5 and 6, whereupon the same is allowed to set. After thecement or other plastic material has become hardened, the bands 5 and 6are removed and the roughened surfaces of the finished product arepainted or smoothed with a water-proofed cement or the like.

It is to be understood that all openings formed by the elements of themould should be filled with the plastic material.

Having thus described the invention, what is claimed as new is 1. Amould construction including split outer and inner bands, means forsecuring the ends of the bands together, supporting blocks, each of saidsupporting blocks having a groove to accommodate portions of the innerband member, the outer edge of each supporting block adapted to contactwith the outer band, and bracing rings positioned within the inner bandmember to hold the same in an extended position.

2. A mould construction including split outer and inner bands, means forsecuring the ends of the band members together, supporting blocks onwhich one of the band members is positioned, separable bracing ringmembers, each of said sections havin an extension adapted to bepositioned with one of the adjacent section, a bolt positioned withinthe ends of predetermined sections, nuts operating on the bolt, and saidnuts adapted to contact with the sections for moving the same to theirextended positions.

In testimony that I claim the foregoing as myown, I have hereto aflixedmy signature in the presence of two witnesses.

1 JOHN W. HARRIS.

Witnesses:

EARNEsT DE VILBIss, WARREN SMITH.

